blob: 6022e7514e0e99ebda831a5724a2eb877a7ff9f5 [file] [log] [blame]
Tom Rini83d290c2018-05-06 17:58:06 -04001// SPDX-License-Identifier: GPL-2.0+
Simon Glassda802b92014-10-04 11:29:37 -06002/*
3 * Copyright (c) 2014 Google, Inc
Simon Glassda802b92014-10-04 11:29:37 -06004 */
5
Patrick Delaunayb953ec22021-04-27 11:02:19 +02006#define LOG_CATEGORY UCLASS_SIMPLE_BUS
7
Simon Glassda802b92014-10-04 11:29:37 -06008#include <common.h>
Bin Meng80279fa2021-03-14 20:15:02 +08009#include <asm/global_data.h>
Simon Glassda802b92014-10-04 11:29:37 -060010#include <dm.h>
Simon Glass6563b202020-12-19 10:40:03 -070011#include <dm/simple_bus.h>
Bin Meng80279fa2021-03-14 20:15:02 +080012#include <fdt_support.h>
13
14DECLARE_GLOBAL_DATA_PTR;
Simon Glassf3301772015-07-07 20:53:44 -060015
16fdt_addr_t simple_bus_translate(struct udevice *dev, fdt_addr_t addr)
17{
Simon Glasscaa4daa2020-12-03 16:55:18 -070018 struct simple_bus_plat *plat = dev_get_uclass_plat(dev);
Simon Glassf3301772015-07-07 20:53:44 -060019
20 if (addr >= plat->base && addr < plat->base + plat->size)
21 addr = (addr - plat->base) + plat->target;
22
23 return addr;
24}
25
Simon Glassda802b92014-10-04 11:29:37 -060026static int simple_bus_post_bind(struct udevice *dev)
27{
Kever Yang6943ee12017-01-18 20:25:44 +080028#if CONFIG_IS_ENABLED(OF_PLATDATA)
29 return 0;
30#else
Bin Meng80279fa2021-03-14 20:15:02 +080031 struct simple_bus_plat *plat = dev_get_uclass_plat(dev);
Simon Glassf3301772015-07-07 20:53:44 -060032 int ret;
33
Bin Meng80279fa2021-03-14 20:15:02 +080034 if (CONFIG_IS_ENABLED(SIMPLE_BUS_CORRECT_RANGE)) {
35 uint64_t caddr, paddr, len;
Simon Glassf3301772015-07-07 20:53:44 -060036
Bin Meng80279fa2021-03-14 20:15:02 +080037 /* only read range index 0 */
38 ret = fdt_read_range((void *)gd->fdt_blob, dev_of_offset(dev),
39 0, &caddr, &paddr, &len);
40 if (!ret) {
41 plat->base = caddr;
42 plat->target = paddr;
43 plat->size = len;
44 }
45 } else {
46 u32 cell[3];
47
48 ret = dev_read_u32_array(dev, "ranges", cell,
49 ARRAY_SIZE(cell));
50 if (!ret) {
51 plat->base = cell[0];
52 plat->target = cell[1];
53 plat->size = cell[2];
54 }
Simon Glassf3301772015-07-07 20:53:44 -060055 }
56
Simon Glass2e3f1ff2016-07-05 17:10:09 -060057 return dm_scan_fdt_dev(dev);
Kever Yang6943ee12017-01-18 20:25:44 +080058#endif
Simon Glassda802b92014-10-04 11:29:37 -060059}
60
61UCLASS_DRIVER(simple_bus) = {
62 .id = UCLASS_SIMPLE_BUS,
63 .name = "simple_bus",
64 .post_bind = simple_bus_post_bind,
Simon Glasscaa4daa2020-12-03 16:55:18 -070065 .per_device_plat_auto = sizeof(struct simple_bus_plat),
Simon Glassda802b92014-10-04 11:29:37 -060066};
67
Simon Glass95397382021-08-07 07:24:04 -060068#if CONFIG_IS_ENABLED(OF_REAL)
Simon Glassda802b92014-10-04 11:29:37 -060069static const struct udevice_id generic_simple_bus_ids[] = {
70 { .compatible = "simple-bus" },
Masahiro Yamada9f569172016-03-01 11:51:48 +090071 { .compatible = "simple-mfd" },
Simon Glassda802b92014-10-04 11:29:37 -060072 { }
73};
Simon Glass79ea8f72020-12-22 19:30:24 -070074#endif
Simon Glassda802b92014-10-04 11:29:37 -060075
Walter Lozanoe3e24702020-06-25 01:10:04 -030076U_BOOT_DRIVER(simple_bus) = {
77 .name = "simple_bus",
Simon Glassda802b92014-10-04 11:29:37 -060078 .id = UCLASS_SIMPLE_BUS,
Simon Glass79ea8f72020-12-22 19:30:24 -070079 .of_match = of_match_ptr(generic_simple_bus_ids),
Lukas Auer3a7c45f2019-04-10 14:46:07 +020080 .flags = DM_FLAG_PRE_RELOC,
Simon Glassda802b92014-10-04 11:29:37 -060081};